seems someone has a kit (for people who don't like plugging in part numbers to hondapartsnow.com) its about $75 more expensive (for me, to ship to phoenix)
$645 shipped to the upper 48 states
kseriesparts.com
24240-PNS-000 - Reverse Shift Piece - $39.20
24430-PNS-000 - Shift Arm Interlock - $24.52
24201-RAS-000 - Fork Gearshift (5-6) - $59.04
24412-PNS-000 - Arm Mainshaft Brake System - $12.24
24413-PNS-000 - Mainshaft Brake System Return - $0.91
23590-RAS-A00 - 6th Gear - Mainshaft - 63.26
91103-RAS-003 - Needle Bearing - $8.44
23916-PNS-000 - Collar - $4.66
23626-PNS-315 - 5-6 Synchronizer Sleve Set - $255.29
90011-PPP-000 - Honda Bolt - Special $5.63
23491-RAS-000 - 6th Gear - Countershaft - $54.92
Shipping and Handling to Phoenix - $34.21
or: $562.32 from hondapartsnow.com (didn't try any of the other sites.) for the exact same parts.
the kit includes 4 parts that the last running list didn't include or need, in bold above. (i think that the fork gearshift took some work to reuse, but I'm not sure as I haven't done this yet.)
I'm including this to just give updated prices for the parts :$484.50 for the bare minimum. (not including needed fluids to do the conversion)