I am not sure they make a chest rig in a size that would fit my fat a--, but they do make a "battle belt" aka "war belt." A very comfortable option that carries enough, but not too much the way I have it set up. Plenty more could be added.
Many different battle or war belt options are available from surplus USGI to high end and expensive Crye or even custom belts. Fwiw, total cost of my belt set up is something like $100 including pistol holster and all. A guy on a budget could assemble a very workable belt for under $50 using USGI surplus gear and genaric molle pistol holster.
Most all war or battle belts can accommodate suspenders and I have them on mine. Crye suspenders I think, but surplus USGIs of the right style work too. The suspenders help with carrying weight, but mostly they prevent me from having to adjust the belt as what I'm wearing changes with the weather. I set my belt up to ride higher than my waist, the suspenders do help it stay put and not slide down.
My belt set up, which consist of a stiff webbing duty type belt inside the "war belt", has three rows of molle at the rear and narrows to two toward the front. I like to be able to hop on a kabota or in a truck without taking it off, so I leave the back clean.
Keep in mind that I shoot long guns lefty but pistols righty: Starting toward the rear and working forward, on the right I have a SERPA holster for my SIG P226 with Chrimson Trace IR laser grips which has a 22lr kit installed. The SERPA allows the suppressor to stay mounted if I want and keeps the SIG where it belongs no matter what I'm doing, crawling under or climbing fences, getting in and out of trucks, etc. Next is a small suppressor pouch then a small ~3"x3"x1" pouch for spare batteries. Then open space and the inner belt buckle, on the left, from front to rear is a roll up bag for my spotter. The roll up bag is canvas and quiet and the sort typically mounted toward the rear on war or battle belts to drop empty AR mags in. Next is a stacked two magazine pouch for a spare magazine for my AR, then a radio pouch with the flap cut off for a 20oz bottle of iced tea, soda, water, whatever.
I used a canteen pouch for my spotter until recently. It's advantage is top flap with a fastex buckle closure, but I like the deeper pouch better.
I will try to post a photo of me wearing my belt, but you can see a lot of different set ups on arfcom in a photo thread for ideas.
JPK