I found 4 aftermarket options a year ago when I was shopping. 4.0 IMS 4.0 Clarke 4.7 Clarke 5.8 Acerbis 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.