First
If you are looking for a ladyboy, you also have to accept what comes along with the ladyboy. That is probbaly also the reason for why you are looking for a ladyboy.
Second
There are a couple of website on the internet where you can find photos and mobile phone nummers for ladyboys living in Bangkok.
I have tried it a couple of times with great success. Nice to be able to have a look before you comit yourself. Some of the photos also shows the more interesting parts.