Hi Adam,
My ram has died on my 240z so I've been looking for options too.
I've seen a couple on ebay in recent weeks, though they appear to be originals pulled from old cars.
I'm probably going to use SGS to either regas my current strut, or replace it. (
Link)
I've never used them before, but they seem like they specialise in this kind of work and may be worth a shot.
Not to hijack your thread, but I'd welcome any feedback from others who have used their services in the past, or know of other companies to use.
Cheers
Alex