I cannot find a listing on Amazon.com and CPOTools.com shows them out of stock.
Edit: Sorry, I reread your post and you mentioned the quick change adapter - that is the RA1126,
but you also mention guide bushings - they are the RA1125. That's a 7 piece set (I have them, purchased fro CPO Tools last year) but they show them out of stock.
The kit in the picture is the bayonet mount that is made of steel and fits directly on the 1617. It requires no adapter. However, brass is the preferred material, and that material isn't available in the bayonet mount. So, you have to have the adapter, plus a second mount that fits in the adapter to use the Porter Cable bushings that are more of a standard and available in brass. I got my adapters from Bosch direct. Phone in your order to make sure you get the exact parts.
I know I'm a day late and a dollar short on responding to this, but in case anyone else is interested, you can get the template guide adapter here Bosch Template Guide Adapter / QC | Klingspor's Woodworking Shop for $8.95 plus tax and shipping and you can use Porter Cable guide bushings. This is what I do. Like Tom said, brass is better.
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