I found 4 aftermarket options a year ago when I was shopping.
I went with the 4.7 Clarke. It was easy to install. I cut the music wire cross brace in half and connected each half to the original fake scoop brackets on the frame. Stock petcock fit right. I wish it had a locking cap sometimes.
The two Clarkes and the Acerbis were just under $200 back then from justgastanks.com.
When you come to a fork in the road, take the single track instead.