There are thousands of handlebars that will fit. I'm not sure you want to air wrestle a 650 lb big with drag bars on it. So here's my method of figuring it out.
Grab a buddy and a broom handle and a tape measure. give the tape measure to your buddy. With the handlebars that were on your bike removed, sit on the bike with your feet on the floor and take that broom handle and put it in a comfortable position you would like to have the handlebars at. Get your budy to measure the distance between the mount and the broomstick. That is your RISE. Now get him/her to measure the outside ends of your palms. That's your WIDTH. The last part you need to consider is the PULL BACK. So typically the handlebars are bent backwards at a point 11" in from the ends. Depending on how wide you want the handlebars and how wide you are at the shoulders would determine the pullback. If you take a set of handlebars and lay them on the table with the front side of the bars on the table, the pullback is the rise in height from the outer bend to the end of the bar. Typically the B2 models have about an 8" pullback where the A2 has about a 4-1/2" pullback. You might prefer something different, so take your existing bars and measure them on the table and then rough guess what you might prefer.
There's lots of suppliers out there who offer bars. you're looking for a 7.8" bar with the measurements that you come up with.
Hope this helps,
Kawboy.
