Usd to Bitcon merchant checkout

Hello there,

So I have been toying with a idea for the last couple of days, now I know there's semi automatic ways to this and it's relatively easy, however I think this would benefit sellers online like me hugely.

First of all I know there's systems which allow you to convert bitcoins into usd, such services as bit-pay etc.

However I'm looking for something different.

I own a small website which sells mostly amazon gift codes which are 20-50% off, However because I'm limited to people with only bitcoin I do not get enough business. Although most my customers who have bought from me within bitmit are regular customers on my website, that just is not enough. I would like some system which would allow a customer who does not use bitcoin to buy one of my items for USD and it automatically gets converted into bitcoins. I'm pretty sure this does not exist, but I'm sure it's possible, even if the whole process took a fee off the price it would greatly increase my sales. I believe this is possible with some sort of exchange system, if not please correct me.

Now the question I would like to ask would this benefit you? would you like something like this? if it's possible that is.