I do not agree that having someone training sales people from the same sector is necessary. When I was in Chem dry , they spent 10s of thousands of pounds annually on external speakers and trainers.
The man who sold the company for 19million in 2005, told me personally once that his policy was to find the person , then teach the skill.
Iam familiar with the North West cc scene, and the only such companies within cc who could train your people would be CHEMdry franchises , and a few Rainbow people , good luck with that!