Large hole, flattop upper?

I have an SP1 carbine that I would like to get a second upper for. I am thinking of a midlength setup with a 1/7 barrel, with a flattop upper. Does anyone make this upper with the large front pin hole, or should I just set it up with an adapter?

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I think there is still one up for auction on Gun Broker.

Thanks for the help, I will probably go with the DD.

The DD large hole upper work nicely. Grant or Bravo Company have or can get them, and can work a custom build for you if you aren’t looking to build it yourself.

Go to the FAQ section of Daniels’ website. There may be some fitting to do on the upper. I will be getting mine next time I am in Savannah and let them do the fitting.