Do yourself a favor and send it down the road. It will be the death of you and/or your wallet…
I can verify the truth of this.
There is a motor shop in Macedon/Walworth that build high end motors for these guys. Last motor I purchased was from him. Last contact I have for him is: Ben Jacobs -- 315.986.9037 (British Auto Recycling is the name I show on the invoice)
For general assistance with difficult problems, talk to Darryl at Charleston Import Automotive -- 843.552.6555. He can get unobtainium parts and even manufacture components that are no longer available. Tell him you received his info from me.
There is also
https://www.mgexp.com/forum/. Generally good guys, but it is the internet. Darryl (who I take madge to when she's broken) says it's about 75% right. I figure you're smart enough to see the 25% that is fecal matter.
Wire wheels are available. Moss or Darryl for "certainty of product" over price. You can find them on the net without too much trouble.
if you get that silver bumper running, it will get some $$ at resale. Those things are the ones everyone wants.