If you are in or near to the USA, you may want to look at Lexjet's Esatin 300. This RC paper is indistinguishable from Canon's old Heavyweight Satin 300. Here's a description from their website:
LexJet's next-generation Sunset Photo eSatin 300g is a premium-quality, resin-coated inkjet photo paper that professional photographers rave about. They like it because the prints they deliver to their customers feel noticeably thicker, heavier, and more durable than mass-market inkjet photo papers; the latest generation is even thicker than before at 11.5 mil. The slightly textured, satin (or luster) surface is like the E-surface papers that were popular in darkroom printing. The print surface doesn’t show fingerprints or reflect glare like glossy papers. This paper’s excellent ink retention properties produce an exceptionally large color gamut for bright, realistically saturated colors and accurate skin tones. Plus, the latest version has an even wider color gamut and an improved white point for greater contrast.
LexJet Sunset Photo eSatin 300g can be used on many pigment and dye ink printers from Canon, Epson, and HP, and is engineered for the latest inksets, including Canon Lucia, Epson UltraChrome K3 HDR and HP Vivera.
Color profiles are available for many models.
All rolls require a 3-in. spindle or core adapter.