Choke thread on carb

[stuartadi]

Hi Guys, 
Have just got my YPVS back on the road, but have hit a problem. The choke lever is bent so got a replacement off eBay. Slackened the old one and it virtually fell out, bringing a nasty helicoil with it.  
Has anyone else had the thread in the left-hand carb repaired well and would they be prepared to recommend a firm that they used? 
I could replace the carb body but I know how much people are asking for these nowadays, and how many different variations there are.

[stusco]

I thought the choke was plastic!how can that strip the thread in the carb body?

[stuartadi]

Only the knob on the end is plastic. The rest of it is brass.