Which flywheel puller?

Hi all.

I’ve only recently bought my first old mower. It’s a Ransomes “sixteen” which is very enjoyable.

I also got a spare engine with it which I want to have a poke around with and a bit of a play.

I’ve read not to use a puller with arms that pull the flywheel off, and also not to strike the crankshaft bolt.
So I’m looking to buy one. I can get some unc bolts on eBay if need be, to fit a modern plate? 
Anyway, any help and suggestions would be great. 
The engine is the villers D07 75cc 4 stroke.