Ubercart

Hello,
I have a site which sells PBX (private branch exchange) and allong with it we also sells phones, we now sells both separately now. What I want to do is to create product page with PBX and at the same page add field where customers could choose which phones they want to buy along with it. They will receive reduced price to phones (lets say 10%) when they buy it along with PBX. You could say lets use Product Kit, but in product kit when you let customers choose quantity they could also set PBX quantity to zero in cart and they will still get reduced price for phones.

Is there a module which could add to the product page a field with selection which phones add to the cart and how many, for better understanding please look at the attachment.
Maybe I wouldn't even need to be an module, even a php code which just add a "Add to Cart" field (with some adjustments of course) based on product node ID would be enought.

Any ideas?

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	phones-selection.png	5.04 KB