Wanted clips for ABC greenhouse
 

Any idea where I can get glass clips (T shaped with a hole for a wedge peg)
for this (aluminium) model? Its a 12'x10', and at least 30 years old. I am
desparate. The glass is sliding out as quickly as I put it in. I have to
screw the metal runners to the frame and use sticky sponge tape. Please
help.
James Mitchell