I was thinking of using Tacotune's baffles as they have ones that would work with 6.5" drivers that I could of enlarged the cutout but I need something that provided more depth. Tacotunes only provide 3/4" and I need 1-3/8".
I decided to just build baffles from scratch out of some 1" and 3/8" HDPE that I would stack to get the depth I need.
I do not have a circle jig so I took the grill ring that came with the JLs and use it as a template. Problem is the ID of the grill ring is 1/4" larger than the required mounting cutout for the driver. So I bought a Whiteside bearing set that fit the Freud 1/2" trim bit that I had so I could offset the cuts.
Rough cut the 3/8" HDPE on the scroll saw. I found that a skip tooth blade (not pictured) worked best for this (out of the blades I have). Wish I would have experimented with different blades, and found this out, before I started cutting the dash baffles.
Grill ring temp screwed to the baffle to hold in place while routing:
Because the grill ring had a slight bevel on OD I had to use 5/8" bearing to get the OD I was after. At this point I also learned about using a pilot pin and built my own out of a scrap piece of 3/4" PVC pipe I had laying around. Definitely felt like it added an extra measure of control and safety.
Used the 3/4" bearing to cut out the ID of the baffle to give me the extra 1/4" I needed. Ended up with two perfectly round mounting rings: