A spoke is a spoke, there are very few variances in basic design, straight pull or regular which yours has, unless you are looking at propiatary spokes, the only additional differences will be in the butting, single, double, triple or bladed, and the spec of steel they are made from, galvanized or stainless.

Unlikely that with a 32h 3 x pattern you will have any issues, but if you did, that would most likely be due to poor build quality, pretty hard to judge with out seeing it.

For getting stronger spokes, Sapim make these http://www.sapim.be/spokes/butted/strong so may be time to fine a new LBS who know what products are available, even if they don't sell them.