for RMB,u can find it easily here in msia..better just change to RMB..no double conversion then.unless if need sum not really popular currencies like NT.better do USD than NT cos i think,they r quite pricey here..

NT selling rate is around 10.8, maybe u cud nego a bit for 10.6..
As for Swiss Franc its expensive evrywhere & the moneychangers normally dun have stock in hand.I see the banks at d airport also selling at 3.27 like that..if u really want it then better t order from moneychanger so they cud find it for u..