It's not worth me trying to ship a driveline (propeller shaft) across the pond. If you get the whole thing (both sections) there is some chance it may be balanced. You can also take your existing driveline to the local driveline shop and for about $90 (on this side of the pond anyway) you can get it cut down and balanced. You can also use the driveline out of an automatic. It's 5/8" shorted that the M41 drive lines so it just rides a bit further out on the spines. I have sold quite a few automatic drivelines to folks putting M41's in 122's...
I have a few working temp gauges around as well.... Drop me a note off list if interested.
Chris
agent_strangelove@hotmail.com