I dont think bringing a 110V DA machine from US is such a wise decision afterall. The voltage transformers are a hassle, and don't provide adequate wattage, which these machines demand.
Get a local machine which will provide proper wattage and will be easier to use where ever yuou decide to use it...
If you are interested to get chemicals from US, you may decide to go for something which is not readily available in Pakistan. I would say Menzerna is one such brand. You can opt to get their 400, 2500 and PLP combination. Another item of interest is wax.
However, I guess most of the chemicals are nowadays readily available in Pakistan.