According to some CSRs there were limited stocks of TM micro sims which were sold in the market. Surprisingly, they would not know how much.
However, if there's none, you could always get an ordinary TM sim and have it cut to a micro sim (Some Globe Business Centers like MOA have cutters). Cost is between Php 40 to 50 for the cut or you could attempt to cut it yourself using this template http://www.thechinacellphone.com/micro_sim_template.pdf or google "how to cut micro sim".
As per Globe Customer Service, they don’t have available Micro SIM and Nano SIM for Touch Mobile.
You might want to try the above suggestion if you want. Thanks!