I have a high end Gorman Rupp 14520-304 that I bought for this purpose a few years ago. It was used when I got it. I ended up using my Little Giant and it
never quit. http://www.marinedepot.com/Gorman_R...ps-Gorman_Rupp-GR1111-FIWPEPOT-GR1115-vi.html
As you can see it is designed for high head. With Mag drive.
$120 and it's yours
This was a $300+ pump new