We gave a similar brief to our travel agent - day trip from KL, mind blowing history. The closest we could come up with was Malacca. So we headed to Malacca looking for another Ayuthaya.
- Malacca is about a 3-4 hr bus ride from KL
- We went on an organised tour which picked us from the hotel
- We had a Chinese dinner at a restaurant there which was part of the package
- You are better taking a 'Lonely Planet' or equivalent because the tour guides are fairly basic