FMF PowerBomb with HMF Silencer – Need Ideas

I bought an 06 TRX450ER that has an OEM header pipe with an HMF Slip-On. I recently bought an FMF PowerBomb header and went to install it yesterday and noticed that the header slides OVER the silencer and I know it is supposed to be the other way around.

My question is, can I make this work with some kind of rubber gasket around the seam with hose clamps (similar to the garden hose trick on 2 strokes) or am I forced to spend the $300ish for a new FMF Powercore 4 silencer?

Thanks in advance for your ideas/input.

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