I have copies of both the VHS workprint and a bootleg of the Japanese directors cut. Although, I'm pretty sure the Japanese bootleg is exactly the same as the official UK release, at least I didn't notice any difference when I watched it.

Does the version you bought off eBay have burned in Jap subs or does it have a burned in timecode on the left hand side of the print? The reason I ask is because the reasons I've stated above. Hopefully the version you have is the workprint, if not, PM me your address and I'll stick a copy of it in the mail to you.

Edit: Just checked eBay, did you buy your copy from a seller called "r_e_v_o_k"? If so, that's the DC not the workprint. I know this because I got my DC from their website.