MG,
Pretty sure that Boeing will do nothing about the P-8 fuel tank production, why would they pay someone else to design, engineer, fabricate, test, certify and set up a production line when they have already done this with Marshall Aerospace? Boeing are not exactly sat on a huge cash pile right now!
And as for "...getting a reputation for being risk averse..." you can only know that if you are in the mind of each and every company that has negotiated deals with Marshall recently, and that is quite a large number of companies if you look at their recent contract wins and awards. Isn't being risk averse what you want from a company? It only exists to turn a profit after all, that's the whole point of a company. If they couldn't reach a price with Boeing that meant they turned a profit, what is point of the contract? As to their future, look at what they do, they are hardly 'metal bashers" now.
Other companies like MADG are also available!