The man wants MORE caster. How about this idea?

Welding if done right might work A-OK but maybe affordable options with the work already done exists.

HDK OEM replacement UCA assemblies (pair) ....still only $349 includes HDK adjustable UCA bump stop

no bind, keep your OEM cam alignment adjuster with the full range of adjustment
*** install with spacers on rear side of adjustable poly ends....3 degrees positive caster
*** install with spacers on each side of adjustable poly ends....4.5 degrees positive caster
*** install with spacers on front side of adjustable poly ends.....6.0 degrees of positive caster

new HDK ball joint receiver captures and keeps dust boot in place.

three OEM replacement arms to choose from based on spindle
a) small ball joint / 4" bolt circle / 9" drum
b) small ball joint / 4" bolt circle / OEM disc
c) big ball joint / 4.5 bolt circle / drum or disc

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