In the UK there are various people who deal in different things. I
have been a happy customer with Peter Purdie at AFE Kidlington,
http://www.afeonline.com/shop/ Email: ; John
Delafield at LX Avionics http://www.lxavionics.co.uk/ ; Dickie
Feakes at BAS, http://www.bas.uk.net/index.html ; and Martin (?) at
Severn Sailplanes http://www.svsp.co.uk/ .

There are no doubt others.

Chris N.