If you can't get the exact same rake, go with smaller rake, not larger.
You don't want to learn the hard way that the larger rake was enough to put you into highspeed shimmy.
This is most likely on tall frames where the *(&$#@# mfgrs use steeper headtube angles to keep the wheelbase short.
I have a tall custom Lightspeed for which I had to order a custom-built fork with 38mm rake, because forks with 43-45mm rake would result in shimmy.