Only 1 reply so far, which is a bit disappointing. Any 1.25" diagonal from Celestron, Skywatcher ,GSO, SVBony etc. are all very similar and will suit the telescope. Unless you want to go upmarket and get Williams Optics or Takahashi or similar premium brands, which would be overkill in this case unless you intend to upgrade telescopes to a premium brand in the future.
As for eyepieces, depends on the budget, A reasonable middle of the road set of SWA eyepieces like the Dual EDs' in various focal lengths like 25mm 15mm, 8mm would be a suitable range of magnifications.
https://www.ebay.com.au/itm/19156515...YAAOSwjRpZUzNq