Every team wore them in 1998, pretty sure they were a Simon Wigg innovation. They began as stretchy oversuits but as the season went on riders had their own kevlars made. Lynn then took it a step further in 2000 with the silver 'machine' bike covers.
It's a matter of opinion of course but to me using your squad is preferable to borrowing riders from other clubs, although I appreciate that in this instance the final is likely to be very one sided.