Anyone know what sizes are available for 23" and 21" wheels?

For 23 I've found..
130/60/23

For 21 I've found..
90/90/21
120/70/21
140/70/21
260/35/21

anyone know of other options?

also what the tallest rear tire that will fit on a 2005 FXDC swingarm?

Doug Keim built to softtails on 23's front and rear and I love the look. I know I can't fit a 23 in the rear but I was hoping to run front and rear 21's on my dyna or maybe a 23 front 21 rear combo.

Thanks.