User Based Order Forms?

[DarkSoul.uk]

Would it be possible to have a mod Created or one thats already out ?

Where
User X > In a Options Panel > Set a list of item's With X price.

User Y > Select's items 1,5,6,7,8,9 which add's up to $xxx.xx , A Private message is then sent to User X stating that user Y has filled in this order.

Payment type Would not be Paypal nor Clickbank , user's sort it out between themself's

Is there anything out there like this ?

Thanks
Sam