Looking for referrals/suggestions on a high-end/luxury category private guide/driver for the following locations:

1. Kuala Lumpur - someone skilled at bringing clients to the city highlights, off-the-beaten path spots, and a day trip to Genting Highlands
2. Bangkok - a luxury perspective focused on temples, non-touristy spots, plus a partial day tour to the Maeklong Railway Market and a full day tour to the River Kwai area

The driver/guide should have experience with higher-end clientele (ie, Four Seasons Hotel guests, etc).