From my previous experience with certain big IPOs, certain remisiers with good contacts either source for the shares from someone who has already been allocated and are willing to sell their allocation for minimum 10% premium in off-market trades. There are other ways, like creating a company.

That's what I was told.

But personally I stay clear of these deals because (1) it's complicated. Legal agreement needs to be signed and if you are not a lawyer, you'll likely be clueless on the T&Cs (2) a lot depends on the good faith of "the other party", who is likely to be rich and connected. (3) You need to pay a premium.

And did I mention that minimum sum required is RM250k or RM500k?

Personally I prefer to go for private placement because everything goes through the investment bank and there's won't be any potential "surprises". The downside is you'll very likely be allocated considerably less shares than what you applied for.