I have fitted a number of ERA Repair Locks, they consist of deadlocking latch and Long deadbolt in the centre section with a roller and hardened, adjustable T-Bolt above and below.
An adjustable one piece keep is supplied with a clever set of multi adjustable, universal frame packers.
They take about 2/3 times longer to fit than the correct or near replacement MPL but are handy as will replace virtually any MPL as long as you have a large variety of handles in stock to cover original fixing holes.
Mark