WTB : De Vere 507 negative carrier

I have a De Vere 507 enlarger in working condition but no negative carrier.

I would like to buy either the original carrier ( glass top and bottom ) or something which would serve instead ....... possibly Durst 138 with double glass could be made to work.

Does anyone have something they are prepared to part with ..... to get me going with this enlarger please ?

Alternatively, any ideas on how to make my own ....

Many Thanks

Great Parts and Service
http://www.khbphotografix.com/