Does anyone know when the FW21 collection will be available to buy? Or when IH typically releases FW collections in past years?

Perhaps this is the wrong place to ask this question, but forgive me, I'm new to the IH forums.

I have tried very, very hard to find an IH fit that works for me.  I am 6'1'', 165lbs.  Very tall and thin, particularly in the legs.  But I have a big butt and wide hips, which seems to throw off denim fits.  The problem I keep having is that the hips and seat of IH jeans are too tight, which causes me lower back pain.  I'm looking for a little help finding the next cut to try, and I think the Shinyaka is the best bet.  I have tried (and subsequently had to sell):
-IH-555s, tag size 33 (hip discomfort when sitting)
-IH-777s, tag sizes 33 and 34 (hip discomfort and not enough room in the seat)
-IH-777-SST, tag size 36 (oddly, fit worse than the 777s 34, although I appreciated the bend in the legs)
-IH-888s, tag size 33 (too small in the waist).

I'm trying to translate the constellation of bad fits above to solve this problem, because I'm determined to find a fit that works.  For someone who has a big butt and skinny legs, do you think I should try:

-IH555-SST in a larger tag size to make sure the waist is bigger than the 33;
-IH666-SST in a 34 or 36 tag size; or
-IH888-SST in a 34 or 36 tag size?

I recognize the IH method of measuring pants that already fit and comparing, but I honestly think that my difficulty lies in the seat and the weight of the fabric.  I'm really just looking for some general guidance here.

Thanks in advance.