Word Choice

It is clear, but I am a word purger by nature, so I would probably say:

We are obtaining subcontractor pricing so we can proceed with (framing - is this necessary?) the changes requested. (Kind of obvious the changes were requested by the customer, unless it was by the City, so you decide if you need to specify that).

Great, thank you!

You are more than welcome! I spent 20 years editing scientific grants and journal papers where you have to keep the papers to a certain number of words without losing the meaning. It's only difficult when you are unsure of the context (e.g. who you were addressing in this example).