That might be something to investigate. Technically the so-called Free World Armed Forces in Vietnam included:
The United States
Australia
South Korea
The Philippines
Republic of China (Taiwan)
Thailand
I just don't have all that much information on the Philippines or the ROC contributions beyond what's in the CMH monograph:
http://www.army.mil/cmh-pg/books/Vietnam/allied/
Laurent Touchard's conversion had a Philippine OOB and an updated ROC one IIRC, and I might see how much I can take from there. The ROC one could easily be modified and added to the standard pack, the Philippine one would require a totally new OOB and be more suited to the planned Total Conversion, along, hopefully, with some sort of Lao OOB (again I just don't personally have the info at my disposal right now).