How to find specific girls, i.e. pregnant girls?

I have been living in HCMC now for almost a year, but there is one thing i still have to find.
I have a fetish for pregnant girls and I want to find one in HCMC for FS, does anyone have any suggestion how to accomplish this?

Maybe the only option is to find a local contact that know a lot girls and can dig one up for the right price.

I realise this come with extra costs, but that is well worth it.

I appreciate all suggestions you might have :)

Anyone else have any other special needs that you managed to have met in HCMC?
You are probably right, i have found it in Bangkok before. Hope for same luck here.
Im happy to get in touch with a local pimp that can find things like this. Anyone have a number? :D