I tried several times to get the reamer from DJ before I had mine done at the PD shoot, no luck. Apparently he has either lost it or it was never returned by the last user, whoever or whenever that was. I don't think the one that was used at the PD shoot would be available either, it was a die and not a reamer, so a gunsmith would have to use it and measure the chamber each turn or so until the right depth was attained.
BTW, I really haven't gotten to wring mine out yet to see how it really shoots, but it shows promise and is now a 100-150 yd. 35 cal vs. a 50-75 yd. 35 cal. I would do it again.
When we all did the 445 SuperMag rechamber a while back, a member actually purchased the reamer and rented to each member for a nominal fee. After a list of users was compiled then the reamer was purchased and each member passed it on the next after using it until all were done. The reamer was then returned to the owner after the last rechamber was done. It's a really easy job to do eeithr of these rechambers and can be done in a few minutes on a vise with some oil and a T-handle or wrench of the right size for the reamer.