Hydraulic outboard front disc options?

[Donnie]

Hi all, im looking for a front brake outboard disc for my mate as he wants one, ive fitted a few and am more than happy with the vietnamese ones which are from about £220 upwards but for some reason beedspeed have one at nearly £35 to £40 cheaper?

https://beedspeed.com/lambretta-outboar ... atb19or1e5

Basically wondering if this is simply cheaper or if its an indian one or possibly sandcast rather than pressure cast?

It doesn't look like it's genuine nissin I know, but some of the £230+ ones aren't either

Anyone got any thoughts, and I have emailed beedy but awaiting a reply.