any equally lenghthed four line bar will be fine

blocker it depends on which LF bar you are talking about, i sell LF products and can help you out and let you know if the parts will work together.

feel free to contact me if you have any questions;

www.alliancegear.com.au

Thank you to all for your info, I am deciding on buying a kite from a shop to get started. That way I am safe with selection. Didn't seem to be an honest seller.

The basic statement that all 4 lines should be equal length is a given on 4 line kites.
The other given is that they need checking as kites can come with different lines for front higher load bearing than the rear and often can stretch to different lengths during early use (as far as I know all kite lines are pre-stretched as part of the manufacturing process).

The main point to look at is the amount of de-power throw.
Some kite models have a setup where the centre of gravity is close to the front lines and a short amount of movement gives all the rotation needed to change the angle of attack. Other kites (with a wider spread in the bridle set-up) may have the rotation point further back and be considerably less sensitive to bar movement and have way more adjustment in the depower. SO before U make the mix try and check what the original would be like etc etc.. - get a better outcome

You really need to know your kites and not just assume - it will only be in the extremes of the kite range that this can be a problem and high wind with a kite luffing on you is no fun (good old days).

Cheers
AP