Probably best to call Jade Range at (800) 884-5233 with some model and serial numbers. Their own website only refers to the Bistro line as shallow-depth heavy duty equipment. No other info. Illustrated parts breakdowns seem to be limited to mostly their Titan Range line.
Maybe Bistro stuff is designed for domestic use, shipboard or r-e-a-l-l-y small kitchens? I don’t know. Not a standard setup for restaurants by any means. I’ve never seen them.