How do I try a longer shaft for my driver, without buying one first?

[Siamese Moose]

I use a 44.5" driver. In the past I've never had consistent contact on anything longer. However, I have undergone a complete swing rebuild with an instructor over the last two months, and my new swing is nothing like my old one. My driving accuracy is way up (10 of 12 fairways last time out), but I believe I'm losing some distance compared to what I've gained elsewhere. My current driver is 7 or 8 years old (Wishon 919 with XCaliber Superlight), so it's time for a new fitting anyway. I'd like to see if I can now handle a longer shaft, but I want to try it on the course. For me, hitting on the range isn't the same fatigue, pressure, or target issues as actually playing. Is there an easy way to try a longer club on the course without spending a bunch (or spending anything)? Or am I wrongly concerned? Will hitting at the range be sufficient? I will add that I plan to get professionally fitted at the same place I'm taking lessons (Miles of Golf, Cincinnati). 

[null]

I have never personally used this site, but I have heard good things: https://www.shaftshack.com/

[cnosil]

Rental as jlukes indicated or find a place locally that lets you demo used clubs. Either try a new driver or find the same model. Some of the online used places like global, 2nd swing, mikes golf outlet may allow trial periods.

[PMookie]

As Joe said, try Shaft Shack. I’ve used their service and it was worth it! Inexpensive, and you get to try the shaft for a week in your own driver head. Great people, great service. 

[Firebird]

Another option is you can buy shaft extenders however they require you to remove the grip. Usually easy to do if you have an air compressor but depending how old it is it could also get damaged.

[csamsh]

Put an extension in your current shaft.  If you don't like it, cut it off.