There are still a few places that sell new or new old stock tapes, including metal tapes, for much better prices than you can find ebay... check out tapeline.in

There are still a few places that sell new or new old stock tapes, including metal tapes, for much better prices than you can find ebay... check out tapeline.info for example. I got a metal tape from them a year or two ago at a reasonable price, but I'm not sure if they currently have any in stock.