Had a quick look in Matty’s catalogue. They list one filter to fit all Elans and +2’s. There is a filter only option too - presumably for very early pumps.
They only list two types of pump - the standard one, and an uprated version.
I could find no mention of more than one pump variant in Brian Buckland’s excellent book. He simply says that it was a standard Ford Kent item.
The T.C. engine was fitted with two types of oil pumps with different filters, the loose cartridge type and then the spin off type, here is the Lotus bulletin describeing it.