Not sure if its repairable but I will include the 2 bits that fell out.
eBay
For Pentax K Rear Lens Cap / Camera Body Cap / Cap Set Plastic Black for Pentax PK K mount camera and lens
Aliexpress UK
eBay
C-PQ For C mount lens - Pentax Q mount camera Mount Adapter Ring C-Q for Pentax Q Q7 Q10 Q-S1 etc.
Aliexpress UK
Optically the lens is excellent with no traces of fungus, scratches or haze. Excellent working condition, smooth focus ring and responsive aperture.
eBay
Lens Cap For Pentax K Mount Lens Rear Cap Or Camera Body Cap Or Lens Cap Cover Set PK For Pentax K1 K5 K10 K20 etc.
Aliexpress UK
6 Element [Near MINT] Asahi Super Multi Coated Takumar 135mm F2.5 Pentax SMC From JAPAN #M7446 Please check the photo carefully and feel free to contact me if you have any questions before placing order! Shipping will be handled by DHL, FedEx, UPS or Japan Post depending on the destination. If the delivery address is in a remote area, an additional charge may be applied by the courier. All items are kept in a temperature- and humidity-controlled warehouse, monitored 24/7. Based on the weight and shape of each item, we use up to 13 types of cushioning materials to ensure protection and minimize shipping weight. -Import duties, taxes, and customs charges are not included in the item price or shipping cost. -Please check with your country’s customs office to determine any additional costs.
eBay
For Pentax PK K mount Lens Rear Cap or Camera Body Cap or Cap Set Plastic Black Lens Cap Cover Lid for Pentax K1 K5 K10 K20 etc.
Aliexpress UK
Early model of Takumar 135mm f3.5 lens in Great condition! Focusing ring smooth and without issues. Aperture smooth and aperture iris dry. Item will be carefully packed and promptly shipped.
eBay
D-PQ for D mount lens - Pentax Q mount camera Mount Adapter Ring D-Q for Pentax Q Q7 Q10 Q-S1 etc.
Aliexpress UK
Pentax SMC Pentax-M 135mm f/3.5 K mount manual focus lens. Tested and working, but fungus is present inside. Fair cosmetic condition (6/10). Includes front and rear lens caps. Manual focus and aperture blades operate as intended. Please note fungus may affect image quality.
eBay
K&F CONCEPT PK-NEX for Pentax K PK Lens to NEX E Mount Adapter for Pentax Lens to Sony E Mount Camera A5000 A5100 A6000 A6300
Aliexpress UK
eBay
9th Gen AF Confirm Adapter PK-EOS Lens Converter Pentax K PK To EOS EF EF-S Adapter Ring for Pentax K PK To for Canon EOS Camera
Aliexpress UK
The Pentax SMC Super Multi Coated Takumar 135mm F2.5 M42 Telephoto Lens is a high-quality portrait lens designed for Pentax cameras. With a maximum aperture of f/2.5, manual focus, and a focal length of 135mm, this lens is perfect for capturing stunning portraits with a beautiful bokeh. Made of durable metal and coated with Super Multi Coating, this lens ensures sharp and clear images. Its M42 mount allows compatibility with a range of Pentax cameras, making it a versatile and reliable choice for photographers looking to expand their creative capabilities.
eBay
135 Portra 800 Kodak color Portra 800 Negative Film 36 Sheets Per Roll 135 Professional Film For 35mm Film Kodak F8 Film Camera
Aliexpress UK