You could check the following site for detailed information about accessories available for Swift.
https://www.autocarindia.com/car-news/2018-maruti-suzuki-swift-accessories-listed-407466
You customize your swift using a combination of the following accessories i.e.body cover, door visor, fog lamp, MAT,Boot Mat, Bumper Corner protector,Bluetooth, cushion, seat cover,navigation system, air inflator, air purifier, vaccum cleaner, reverse parking camera, reverse parking sensors,flocking, spoiler, remote locking,etc.
the site mentioned above provides the variants that these accessories are available for and the prices of each of these. Most of the accessories are available for all the four L,Z, Z+ and V variants.