I bought these Bodylastics bands and they work great. Looks like it comes with a pull-up door attachment like /u/mooseinakilt linked below too.

Bodylastics Bodylastics Stackable (12 Pcs) MAX Tension Resistance Bands Sets. This Leading Exercise Band System Includes 5 of Our Best Quality Anti-Snap Exercise Tubes, Heavy Duty Components, and a Travel Bag. https://www.amazon.com/dp/B006NZZH18/ref=cm_sw_r_cp_api_i_KAudBb1XYFGV7

May be a little more expensive but you get what you pay for. I still use bands from the first set I bought 10 years ago. I’ve bought 3 sets over the years just to add to what I already have. Never had a snap or breakage. Customer service and support is great as well.

Id also recommend LIVEExercise.com, specifically the Chiseled show. Great band focused workouts.

It sounds like I’m shilling, but these bands helped me turn my life around and I’m eternally grateful for it.

Edit: I didn’t realize this was the p90x sub my bad. Love p90x as well. German potato soup is excellent.