An idea for Astral Knights shoulder pads.

Whilst browsing the web for ideas and bits to use on my Astral Knights I came across these shoulder pads.

I think they have great potential. The bottom one would work particularly well as a standard trooper shoulder pad.  I would still have to freehand the star design behind it but it would give the army a much more uniform look and raise them above 'just a paintjob'.  The other two would be good on characters, veterans or sergeants.

The downsides would be cost and availability as they are from the dark angels veteran sprue and I would have to source a lot of the last design.

Any suggestions for alternatives?