I'm sure someone has what you need laying around.
Che, I have the 'guts' from a '50 speedo.It's a bit sunburned but all there..
I used the original gauge shells to install aftermarket gauges.
I realise I'm quite far away from you, but it wouldn't cost a bunch to post it to you.
I don't want anything for it,just for you to cover the postage costs.
PM me if you want it.
Jock.