As someone who goes thru lots of suits a year since I'm in the water at least 3 times a week all year round, doing water aerobics.
If you have a value city or a tj max, check there, they do carry larger sizes.
Most of the suits start at $20 at value city. I think some at TJ max start around $20 or $25. They have the conservative speedo's, for $19.99
As I'm in the water so much, doesn't matter if you spend $20 or $85 or more, its not going to last me more than 3-6 months. After so many times in the chlorine the suits start to fall apart, and become see thru. Some of course will break down, and stretch out sooner. A quality name like speedo, tyr last longer for myself. For me its not worth $60 or $80 bucks when I can goto a store and pay a fraction of the cost for the same suit. I'm less picky about my workout suit, but the nicer ones I purchased were less than $30.
I think the nike suits tend to stretch out sooner than the speedo and tyr's.
Both stores also carry brands I've never heard of, just make sure to get a suit that has a soft cup, or look for a brand you know. I made a big mistake one year, and bought a suit that caused some chaffing, just jump up and down a few times and you'll know. If its a tad scratchy, put it back.
Connie