Hi, I was wondering if anyone knew where I could get some M3 flash bulbs other then looking on Ebay?

I have a Polaroid 250 with a flash gun that uses the M3 flash bulb and I was lucky enough to get a box set of 12 of GE's M3 flash bulbs. The problem is, it had came with my Polaroid when I bought it and I just can't seem to get myself to use them. So I thought it'd be easier on me to buy another box set even though it's going to set me back some (quite a lot) bucks.

Whatever advise you can give me will be helpful. Thank you.