Hi smhgng76,
You can try www.kntj.sg
Was introduced by my brother as his house wall murals are done by them.
Accordingly to him, they are the one doing wall murals and art decor for most of the higher end showflats.
For my case, its simpler haha. I have 2 boys, though they like different cartoons. (beyblade and animal kaiser :0)
Thus i was at a loss of what to do.
The guys at kntj actually drop by my place to measure, ask about my idea, and even chat up a bit with my boys (seems like 1 of them had a kid also like beyblades :0)
After a couple of days they showed my their proposals and had everything up within a week of meeting.
In the end the result is great, and my boys are really happy to go to bed every night haha!
Funny thing is, I did not even pass them any books or magazine to scan and they are still able to create an artwork out of just understanding what i want.
Very professional and friendly guys.