Generic rectifier with VAPE AC ignition?

Hi guys,

I just ordered the SIP Vape Sport ignition for my XL2 engine, to power my SIP Speedo. However I now realise I ordered the AC version rather than DC!

Firstly... what is the point of the AC version when the DC version is much better for modern use?

Secondly... I see the rectifier to convert the AC version into DC is available separately:

However, stock is not available until the end of September!

Is it therefore possible to use a standard 4-pin motorcycle rectifier (found easily online for <£10) with this ignition kit to make it the DC version?