as350 Soloy Conversion
There a few used kits around and used/serviceable C30's are usually available at : Web Site: Sunrisehelicopter.com
Soloy should know the location of the old kits that have been removed.
When you dig into it you will find that he price differance between the Allstar kit with a C30M and a Super D kit using an LTS101-600A-3 or A-3A is not very much.
As far as operating cost and reduction in maintenance is concerned the LTS installation is the best long term solution.