Inline hopping help

[Oh Crap]

Hoping someone can help or point me in the right direction.
I have a 3 tap tower but only a 2 line cooler BUT I was thinking of rigging the spare line to use something to run the beer through fresh hops....  Ny problem is I don't know what the something should be.. Some sort of inline hop thingy. Any ideas?

[dcalnan]

I've been thinking of doing this at some stage as well, if you google diy hop randall you'll get loads of ideas. here's one for an example http://kaibrewing.blogspot.ie/2013/04/diy-randall-enamel-animal.html