Since you have a paracor, just get some medium price eyepieces with 80 deg view like bintels here
https://www.bintelshop.com.au/Product.aspx?ID=7508 for the 20mm and then here
https://www.bintelshop.com.au/Product.aspx?ID=7509 for the 30mm.
The paracor flattens the field nicely, so the eyepieces should show a nice image when combined.
People may complain about image quality at the near edge, but like i said, you do have the paracor and so you eliminate most probelms before it gets to the eyepiece.
Do yourself a favour and just try one. i used a 30 on my "Old" 22" f4.5 reflector that had a MPCC, images where great. But without the MPCC, the edges where not as good. Mind you still good, but not as good as with the MPCC..
Theo.