MX5 seat conversion in a 1990 T25

[Ewee]

Hello. Real sorry if this is answered but I can't find what I'm looking for. I've just bought a good pair of MX5 seats at a good price. They're the ones with adjustable headrests and belive they fit with adapter rails. I'm wondering if anyone here has done this conversion and how it went and where they got the adapters from, or if they made they're own?
Many thanks.
Neil.