Garman247-
First off, welcome to winnieowners!
Second, you should add a signature to your user profile. It usually includes the year, make and model of your coach, but can include other information. A signature is appended to each post. To create/edit a signature, click on the "User CP" link in the orange bar at the top, then click on "Edit Signature."
Re: Grill regulator replacement. Torjik makes a line of parts to modify popular grills.
Here's a link to a Web site that sells Torjik parts. I have no experience with them, but would try that first before I went the propane cylinder route.
Another alternative: Keep the grill as is, but add a tee between the outlet on the permanently-installed coach propane tank and its regulator. Here's a link to a Web site video that shows everything you need to do:
Installing a Camco 59123 4 port brass tee (Extend-A-Stay)
You simply move the regulator to the right. If the hose is not long enough, install a longer hose. On some coaches more thought is needed to add the tee, due to te tanks and regulator locations. I added the tee on my former coach, and it worked well.
... until I bought a propane firepit. They consume a lot of propane. The "delivered" price for propane in one park where I stayed seasonally was over $6 a gallon. Propane at Tractor Supply was $2.85 a gallon. So, I bought a 20-pound propane cylinder to run the grill and the firepit. I had no place in the motorhome to safely carry the cylinder, so at the end of the season I gave it away to one of the more-permanent residents.