Those little round marker lights were on a lot of Euro cars.
Red and amber. Clear too, I think.
If you want the DeTomaso original, try a vendor and take your wallet.
I see the more generic ones - heck, they may be the same as the vendors sell - on the European eBay sites all the time.
If you can wait, I'll post a link next time I come across them. They are FAR from $300, I think they are more like $15-25 apiece.
You are prepared for body work - welding, etc., right?
Larry
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.