E36 RTAB carrier bolt snapped

[Phoenix]

Just changing the rtab and one of the carrier bolts has snapped. I was so lucky is was just one as they are all very badly corroded. Tried the usual tricks before trying to remove them - soaking several times with penetrating oil, trying to tighten them a fraction before removing etc etc.
What do I do now? I guess I will not be going anywhere this weekend now.
Anyone know of a mobile guy who does stud removal around Nottingham? It's the bolt that goes into the chassis so cannot unbolt it and take it to an engineering shop.

[8Tech]

Whats an RTAB?

[Phoenix]

Sorry, it's the rear trailing arm bush. Have spent hours on the phone trying to find someone who can sort this for me, with no joy, yet.