Lola 642 gas cap ID

I lost the gas cap off my Lola 642E and I am having a lot of trouble identifying it.



I need another and have no idea where to start (apart from replacing the neck).



Anyone recognize this?



Peter

Attached Images

	2014-08-27 18.46.01-800.jpg (45.5 KB)
	2014-09-17 14.19.55-800.jpg (39.5 KB)