Tanaka TPS-260PF Pole Saw replacement parts?

[Mluke]

Hello, I have a TPS-260PF pole saw with the 3' extension(748512).  Long story short, my 3' extension was bent by a branch and I am now in need of a replacement.  This model and parts have been discontinued by Tanaka, as well as replacement parts.  I cannot seem to find any extensions anywhere, 2' or 3', and Tanaka customer support has been no help whatsoever. 

My question, does anyone know of other brands that might offer extensions that would be compatible with this model?  It has a 7mm spline drive if that helps.  Any information would be appreciated greatly, as I've wasted far too much time in this search already.

Thanks in advance!

[Inaotherlife]

That's like the ones that can have multiple different attachments, right?

I'm pretty sure that a lot of brands are interchangeable, except Echo which has a slightly smaller ouside diameter. And I've even heard of people sanding down other brands to fit in the Echo.