I know of no Rallos imbued armor that can be worn by DEs. The human Rallos plate can be worn by every medium/small race EXCEPT dark elves, plus Barbs. The Ogre Rallos plate can be worn by the three classic large races (i.e. no Iksar). The only DE wearable imbued plate I know of is the DE Innoruuk-imbued plate.
Sorry.
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(If he wants to be an elf warrior in rallos-imbued plate he would have to reroll as wood-elf or half-elf.)
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To answer your price question, when I was doing human cultural smithing (over a year ago) I charged ~ 11k for a full 13 piece set of rallos. Currently active smiths might charge a bit less than that, depending on competition and/or how they value their time. Other race imbued gear is probably a lot more expensive until a few months after velious drops (the human imbued stuff doesn't need enchanted metal so avoids the pricey reagent gems.)
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