I have 3 x 2" extension tubes that I have no use for.
A Bintel 80mm, a Bintel 50mm, both with brass compression rings.
And an unbranded 2" which seems to be about 45mm, no compression ring.
For some reason the screws are missing on the Bintel items, I'll try to find some.
Happy for you to make me an offer...
Cheers
Chris