K.M.
Hi T.,
You're probably thinking of Mother's Milk tea. It's by Traditional Medicinals and you can find it in most Whole Foods, and in Pharmaca and Elephant Pharmacy in Berkeley.
You can also take Fenugreek capsules. The lactation consultant I saw recommended both; taking Fenugreek tablets three times a day and drinking the Mother's Milk tea. This worked really well. You can also get Fenugreek in all those same places.
The funny thing about Fenugreek is it makes you smell like maple syrup!
But the most effective thing I used (a different time) was More Milk Plus herbal drops (I got those at Whole Foods too). They worked too well -- I got engorged and had to stop taking them. That was in June and I'm still breastfeeding my 9 month old. But I've noticed recently that my supply is starting to wane again so I'll probably try all these things again myself.
Good luck,
K.