Bulk powder L-Citrulline source for best price

[Bbobtucker]

Been using bulksupplements.com brand either from them or through Amazon. I usually buy the one kilo (2.2 Lbs) for around $35 bucks US. I know the price per ounce goes down if I buy larger quantity but the kilo pack is pretty easy to manage - looking for more affordable alternative, any ideas? Thanks!

Chad