If selling thousands of items then its not realistic that everyone will remember what options or accessories must or can be selected for every item sold (especially when new sales persons starting). Feature to have linked items and define items options, accessories would save hours per week or every sales person. On top would avoid need to train sales persons in many cases (to learn products what they forget anyway soon if no active sales immediately).

As such funtion woild be very close to configurator then product configurator option on quote form would be helpful also.