Isolated elevated VLDL-3

I recently did a follow up VAP test.  My initial test was 6 months ago.  The two main goals I had was converting LDL pattern from A/B to A, and lowering a slightly elevated VLDL-3 (13 mg/dl).  I was able to convert to pattern A fortunately, but I was only able to lower VLDL-3 by 2 points, down to 11 which is still out of range, according to the VAP ranges.  Further test results that may be of importance:

HDL-2 from 15 to 24
HDL-3 from 36 to 46
LDL from 82 to 90
Lp(a) from 5 to 6
Trigs from 103 to 75
Total VLDL from 21 to 17
Remnant Lipo from 24 to 20
apoB100 from 74 to 71
IDL from 11 to 9
LDL-R from 66 to 75
Total Chol from 157 to 177

Recent Homocysteine, and CRP levels were well below desired range.  I also donate blood 3/4 times per year to minimize the adverse affects of potentially elevated ferritin levels.

From what I have read, VLDL-3 is not so much genetically influenced.  What more can be done to lower an isolated high VLDL-3?  Is there a certain supplement that could help?  Something obvious that can be modified in diet?  I take fish oil (2G), niacin (500mg), and vitamin C (500mg) daily.  My diet is very low fat, low cholesterol.  I use healthy oils and eat fruits/vegetables on most days.  I avoid red meat entirely.  No fast food.  Exercise every other day.  My family history is very strong for early heart disease.  Any advice would be greatly appreciated.  Thanks!