I was at the library an going through one of their Mother Earth publications and saw an advertisement in the back for reusable canning lids that are also BPA FREE!!!
In that same magazine was an interesting article about the harmful effects of BPA on humans (like cancer, early puberty). They use it to line most cans; another reason to can/jar your own food! However, even the lids purchased at the store are lined with BPA – although it’s a lot less than an entire can.
These reusable lids apparently were on the market back in the day and now with the resurgence of the do-it-yourselfer, they are back in production and can be purchased at http://www.reusablecanninglids.com
There are also youtube videos you can watch too. I will order these this year and make sure they go onto lids that will remain in the household with me as they are a bit pricier than the other lids.