Vm110 analogue out- design, sale and copyright

Hello,
living in UK.
I have designed a small project with the VM110 and am investigating sales potentials.
I was wondering if you do or know of anyone whom does just the ‘analogue out’ USB part of the interface as a seperate board still using the k8055.dll. So that it can be resold as a part of a unit. we have designed the rest that connects to it. And have written some pretty advanced software.
if there are any legal concerns about resale, redesign and copyright could you please let me know.
Inquiering for price on 25,75 and 100 boards of just the analogue out part as a whole board, for resale and how much this would cost in these numbers. alternatively can licence to this circuit diagram part, be purchased, as just the analogue out, so that it can be made up in a factory closer to home for resale and if so how much would it cost to have a circuit diagram and electronic parts of the USB board. I would really like it pre made up if possible.Hopefully by Velleman themselves.
I really like your product and find it reliable and easy to use and program.
If you do this information, or know of anyone contactable that does, or does this for you, could you please let me know further information. prefferebly in UK, England, but anywhere worldwide reachable by mail.
many thanks and i look forward to hearing from you.

yours sincerely
N Hurd
lifeeternal@live.co.uk