ExCal...,
There is not really a secret alternative for purchase... but an alternative to sending the entire frame/old glass back to ERA to do it. You are correct, it is one of the more UN-FUN things I've had to do on my car. Not easy or fun at all. Just because I'm a bonehead, I had to see if I could do it myself. Maybe next time I'll be sending it in too... kept my box too just in case I break another one.