Eheim has two different intake/spraybar systems for these type of canister filters and filter systems are sold that contain either type in the box.
The cheaper system uses one piece green plastic tubing which is what you have. As mentioned here you can trim them to the appropriate lengths. You can purchase replacement green plastic tubing parts from a number of retailers.
The more expensive Eheim professional system has a much better design and can also be bought as an after market item if you want to switch later (intake and spraybar kits are sold seperately).
http://www.fosterandsmithaquatics.com/product/prod_display.cfm?pcatid=9606
The professional systems ares modular in design (small or large tanks), blends in better (dark grey), has removalbe screw caps on top for easy priming or cleaning of attached tubing, has easy non leak tubing connections and removal, comes in two attachment tubing sizes (12/16mm or 16/22mm), is larger in diameter, and has a number of special Eheim accessories (flow monitors, diffusors, extra tubing sections, etc...).
It is an all around better intake/spraybar system and I use them on all my Eheim canisters and could be used on other brand canisters as well.
Some of Eheim's systems (especially those with included media) ship with the newer modular intake/spraybar kits and thats a great deal. Look for them to be specifically mentioned in the product description.
Personally I think the included Eheim Suction Cups are still worthless (in either system) as they get hard over time and do not stick to the tank glass anymore.
I recommend ZooMed MagClips which use non rusting black industrial magnets to hold the intake/spraybars in place as they never wear out (although they do initially cost more). I find they work great in all my tanks and also hold the tank backgrounds on as well without tape. Each MagClip comes with five different size attachments and just attach the correct size (from airline tubing to intake/spraybars). I use two on the intake and two or three on the spraybar (depending on width).
http://www.fosterandsmithaquatics.com/product/prod_display.cfm?pcatid=19711