Subject to availability - if you want this ask before ordering. Just as an example.
eBay
6.5-inch Integrated Speaker Empty Box,DIY Dual Speaker Box,Two-way Home Speaker Housing,1Piece Wooden Speaker Box,DIY Sound Box
Aliexpress UK
These ports are engineered to optimize the airflow within the speaker cabinet, resulting in deeper and more accurate bass tones.The bass reflex port tubes are suitable for those looking to build or repair their own subwoofers.
eBay
Square 4 Inch 8ohm 5W Speaker With Speaker Net Loudspeaker Speaker Grill Arcade Game Machine Accessories Cabinet Parts
Aliexpress UK
This ToneVillage 1x10" Cabinet kit features. Self-assembly for Guitar, Bass or any other project requiring robust, high-quality cabinets. 18mm Hardwood Ply Cabinet front with cut-out for any 10" Speaker.
eBay
12 Inch Subwoofer Empty Cabinet 280mm Inner Diameter Speaker Box HDF HiFi Audio Shell DIY For Full-Range Speaker Accessories DJ
Aliexpress UK
This ToneVillage 1x12" Cabinet kit features. Self-assembly for Guitar, Bass or any other project requiring robust, high-quality cabinets. 18mm Hardwood Ply Cabinet front with cut-out for any 12" Speaker.
eBay
6.5 Inch Speaker Cabinet 18mm MDF Empty Sound Box DIY Enclosure Front Rear Port Speaker Accessories For Home Theater DJ Studio
Aliexpress UK
See my other item for large woofer cabinet Subject to availability - if you want this ask before ordering.
eBay
Personalized Nautilus Speaker Box, 3 Inch Solid Wood Bookshelf Speaker Cabinet for DIY 1 Pair
Aliexpress UK
This ToneVillage 2x8" Cabinet kit features. Self-assembly for Guitar, Bass or any other project requiring robust, high-quality cabinets. 18mm Hardwood Ply Cabinet front with cut-out for any 8" Speaker.
eBay
8Ω 1W 2W Mini speaker 4Ω 2W 3W full range cavity sound speaker connector Smart Home Voice Speaker BOX Audio DIY Bass Speaker
Aliexpress UK
2 Count Speaker Catheter Plug Acoustic Port Noise Reduction Sponge. These port tubes contribute significantly to the low frequency output. Give your speaker a professional appearance with these attractive port tubes.
eBay
Car Dome Tweeter Speaker 500W 4Ohm High Frequency Loudspeaker Universal Car Speaker Auto Audio Treble Speaker Loudspeaker
Aliexpress UK
2 Pairs Short Toe Split Sock Practical Split Toe Sock Short Split Toe Sock. Give your speaker a professional appearance with these attractive port tubes.These port tubes contribute significantly to the low frequency output.
eBay
Car Speaker Set High Quality Car Audio Two-Way Speaker Full Range Speaker Car Front Door Speaker Modification Bass Speaker Kit
Aliexpress UK