Just got a Hirdhawks grip for my Crosman 2240. Yes, it's a bit ridiculous spending more on the grips than the gun itself, but man do they look and feel great. They're noticeably better than the wooden grips I purchased from Ebay.
The sights are from https://www.airgun-parts.co.uk/iron-sight The shipment got hung up in US customs for about a week and a half. Other than that, I like them a lot. I don't think there's another iron sight option for the 2240XL.