I'm looking for a "flexible grommet", something like a grommet crossed with a steering rack gaiter - but only needs to cope with very
small vertical movement
Anyone know of a product that might do the job?
I've drawn the sort of thing i'm after:
This is pretty close, but I suspect too large, I'm looking for an entry hole around 40-50mm with an internal hole of 20mm ish
MG CLUTCH GEAR STICK LEVER GAITER RUBBER MGB 1962-74 22H1337, 4G8
Gland and witches hats or bulkhead grommets are names ive seen.
How big do you need?
Original 2"' (52mm) Lucas Black Rubber Bulkhead Grommet : Part No. 54959921
Spot on with that link! Thanks very much 
They make them
big wasa - any idea what I should search for or what those are called?
Firewall boot
Spiral Wiring Gland ?
No, is it a one off you need or multiples for a project ?
"Stepped Grommet" is closest
https://www.google.co.uk/search?q=stepped+grommet&tbm=isch&tbo=u&source=univ&sa=X&ei=hMlVUqSUJ-ir0gWp74B4&ved=0CEQQsAQ&biw
=1745&bih=968&dpr=1
Or just google image rubber bellows or bellows grommet
[Edited on 9/10/13 by Andy S]
I hear the voices of the LCB.
It says "easy!"
http://www.mossexpress.co.uk/stepped-grommets-570468
Some cars have something similar where the steering shaft goes through the bulkhead.
But if you want a really flexible multi use grommet try LINK