Tricked out my 2019 RadRover a bit. Was looking for a clean, ol'skool look that wouldn't break the bank. Didn't really swap out very much here, and none of it was expensive. If you're interested in parts and links, I can share here.
EDIT: Adding the parts list and price I paid at the time, almost all from Amazon. Prices may be less or more today, Amazon stores always shift in pricing. But no single thing here is expensive on it's own, and you can buy them piece by piece over time if you don't want to dent your bank account with one all-in purchase.
YouTube:
https://www.youtube.com/watch?v=h96vh1asn-I



1.)
HANDLEBAR GRIPSYou can buy the same pair from Rads website for $25
https://bit.ly/351C5rWAnd here are other links to a similar styles on Amazon:
Amazon link 1:
https://amzn.to/3fzXMThAmazon link 2:
https://amzn.to/3fDHxo4Amazon link 3:
https://amzn.to/39PNJK5Amazon link 4:
https://amzn.to/2VQka32Amazon link 5:
https://amzn.to/3mZgbNmAmazon link 6:
https://amzn.to/36TrFw92.)
MIRRORBobber style motorcycle mirror (Paid $32.99 in May). Fits and holds very tight, no shaking loose or bouncing out of position.
https://amzn.to/3goXRdT3.)
SEATSpringer style hard seat (paid $29.99 in May). Many similar brown leather styles on Amazon if you want something a little different or larger/smaller/padded/affordable/etc.
https://amzn.to/3lTpEVg4.)
SEAT POSTSuspension seat post - 27.2mm (paid $54.99 in Sept 2019). For the price, you can't beat it.
https://amzn.to/3lRBpvm5.)
TIRESTires are by Schwalbe and called Fat Franks (paid $34.99 in April). They're 26 x 2.35.
https://amzn.to/2IohVRc6.)
TUBESDuro tubes are 3 inch (paid $31.99 in April)
https://amzn.to/39MLDux7.)
TIRE LINERSYou don't have to get these, but they help and come recommended by many. Tuffy fat tire liners for tires up to 3" (paid $34.99 in April)
https://amzn.to/39PO67r