I would think it would be a minor miracle if anyone caters for this KHONDAHM.
I doubt, in the extreme, if there is actually a customer base for this type of product that could sustain a business.
Just about your only hope might be to convince a place making their own pizza to cook yours for you in their oven.
I am not sure exactly how lactose free you require your pizza, but if it includes a complete dairy free base then I am not sure that half the ingredients can be found in Udon, without even starting on the issues of the topping.
An example of a lactose free base...
2 tsp. dry yeast (1 packet)
1/2 c lukewarm water
1/4 c amaranth flour
3 3/4 c white rice flour
1 1/2 tsp. kosher salt
2 tsp. Ener-G Egg Replacer
1 packet Knox Gelatine
1/2 tsp. xanthan gum or guar gum (optional)
1 Tbsp. mixed dried or finely chopped fresh oregano (optional)
3/4 c cold water, plus more as needed
1/4 c olive oil, plus more as needed