It would probably be cheaper to do the Truggy. When I did this my LHS was clearing out the 1.0 buggys and truggies at a sick price and I walked in about 10 min late to get the last truggy.
If I ever convert it back I would rather it be a buggy anyway so it doesn't matter. I also got lucky and had some of the costly parts given to me and I onlu paid 29.00 for the chassis.
Read the signiture... It says it all!