Multiple Quantities for each product

[viperxx]

I have a client who sells T-shirts and needs to keep track of Quantity by Size.. For example, if you have one shirt with 3 sizes, small, medium, large and you need to keep track of the quantity for each one, 5 small, 10 medium and 15 large shirts available.. Does anyone know of any contribution or a way to do this besides creating seperate products for each size?

 

I've tried to find one in the contributions but haven't had any luck. I could design one my self (I've written a couple of modifications already), but its a lot of work I'd rather not go through if someone knows of a contribution already designed.

 

Thanks