Allowing members to pay for other's subscriptions

[Blind Guardian]

I'm trying to find out if there's a product available that would allow members on my forums to pay for another member's subscription. I've tried digging around vbulletin.org, and checked vbulletin.com, but I couldn't find anything more than speculation and conjuncture.

Does such a product exist, or could one be easily created?

Thanks.

[Blind Guardian]

Any thoughts on this?