If considering new, I know there are plenty of aftermarket vendors that carry those. Likely you won't find a compatibility listing showing the CTX1300 but since our CTX bikes use a LOT of parts and components from the ST1300 look for that bike in the compatibility listing. Any year but probably the ST1300 2012 model since that was the last one made for the USA market. The stock foot pegs are the very same part number from the ST1300 and the peg mounts for both rider and passenger are the same as that bike.
/bob 2013 White Suzuki Burgman 650 ABS - my current ride
2003 Honda Metropolitan CHF503 - wife's ride flickr photos of CTX1300A
Yep, that lone state of Maine is where I owned my first mc.
I moved your new post to the existing thread you already had started on this very subject 2 days ago. The posts submitted Monday and yesterday following your first post should provide the information you need.
Since you already had a ST1300 you should be able to use the very same lowered peg setup for the CTX1300 since that part is exactly the same part number on both bikes. Or you may choose one of the other options mentioned here. It is likely you cannot find the adapters you want because many aftermarket vendors are not listing the CTX1300 in compatibility lists, but as mentioned you want to look for compatibility with the 2012 ST1300 or Gold Wing bikes and know they are the same mounting on this bike.