Vega do a very nice motor mount that you can mount the spur gear cover with, you can then run Centro shells etc
You can see this mount on my cars here:
http://www.oople.com/forums/showthre...=66391&page=15
Give Xtreme a buzz and they will sort you out, I think these are around £30 but as per all vega stuff amazing craftsmanship and quality.