So here's what I've been able to find out for those interested in XXR wheels. The XXR 526, 527, and 521 are all back ordered. All other models should be available. I personally was interested in some gold/polished lip 521s in 18x8.5 5x114.3 but I guess the only offset available on these is +25. There is a +40 and +30 just not in gold
I was also looking at some gold 522s in 18x8.5 5x114.3 +48 or +30. Sucks for those wanting the 527s and especially a specific color and size. The chances of finding a complete set with the current situation at hand are slim to none. Best to go with different wheels or be patient and wait it out.