Depending on how long Greenfire has had their stock there could be people here that already purchased and raised them. You might have to wait until spring but could put up an add in Buy/sell/trade stating your looking for Greenfire stock eggs or chicks. That would reduce costs.
Barnevelders...
If hatchery quality will do then Ideal Poultry has both the red breasted and silver. Red breasted is a full pound heavier than silver.
http://www.idealpoultry.com/assortment.html
Look in the standard tinted layers.