Filtering freelancers on ThaiFriendly is indeed a chore, but you develop a sense of it after a while.
Here's a few:
I tried 2-3 of them (not all), and added a few on Line. No 100% guarantee they're all freelancers and available now, but about 95% I'd reckon.
Just a starter list, I'm sure you'll find more. No damage in asking, especially if you have a throwaway TF account.
New regulation (since Jan 1 2016), makes this 30 days by land (for all eligible countries), but limits the ground entries to only two per year.