Don't cut yourself short.
There is no shortage of gays in Thailand (male or female) who actually prefer having sex with, and relationships with, older partners. Granted, this is certainly not the majority, and hooking up a guy with this preference is no easy task - but it's definitely possible.
You have a wonderful personality and an abundance of "good karma", and Thais are much more attuned to these elements of "substance" than young guys in the West IMO.
Nothing in life is free. And relationships, regardless of differences in age, gender, religion, or signs of the zodiac, are no different.
I have a good friend (in his mid 70's) who's been trying to find a boy to enter into a serious relationship with for years - but so far no luck. Every time I see him he's with a different boy and they're always "Dream Boys" who you can imagine seeing starring in a TV soap opera one day.
We sat having drinks one night and he asked me what I thought he was doing wrong. After thinking about it for a minute - I told him to try picking an ugly one. He thought that was hilarious and laughed hysterically. I just chuckled.