[VoiceOps] Getting a century block and/or specific prefix in NPA 760

We have a customer who relies heavily on image marketing who has requested this. We use Bandwidth and thinQ, neither of which have much for sequential numbers there. And for some reason they asked this: *** We will need a block of 100 numbers. Hopefully you can get close to 760-459-4500 as the first number in the block. We have to have area code 760. As soon as I get a count on the number of phones needed I will let you know. *** They are a good customer with hundreds of phones with us, and I know they'd pay if we could figure out some reasonable way to do it. Ideas?