I'm not an expert, but the first place I would look is on the breastfeeding forum here on BNB where there are some really helpful ladies who can help with getting mums and babies back on track with breastfeeding. From my point of view 10mls of breast milk per feed is still 10mls, there will be some nutritional benefit there, you'll get skin to skin contact etc. Secondly, the pump is nowhere near as effective as your baby, so even a good pump will be getting less out than your baby will get. There are ladies who do something called relactation, which is where they rescue a breastfeeding relationship almost from scratch - I think it sounds like hard work, but if it's what you want it could be worth it. Are there any breastfeeding support groups near you? La Leche League run groups for mums and give advice. If you google kellymom, you will find a great bf website with loads of advice on all kinds of problems, like low supply. Remember the more you boob feed the more milk you will make, so if it's possible for you, you could try a nursing weekend snuggled up with your baby just feeding all day in front of the tv while someone gets you drinks and food.
There will be much more advice over on the breastfeeding board too. Good luck!