system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] How did the Emperor happen to have a bad-ass Darth Vader outfit lying around for Anakin?

Seriously...  unless it's off-the-shelf gear for intergalactic paraplegics, how did all of that happen so quickly?  If it took course over a matter of days/weeks/months, did  Sidious design it himself?

Also, it seems that Sidious didn't care about any of his other apprentices, why Vader?  I thought that if a Sith Lord underling wasn't tough enough to survive everything, that was proof that he wasn't tough enough to be a Sith Lord.
gpt
According to the novelization, the surgery on Anakin/Vader took more than the few minutes we see in the film;

>In the newly renamed Emperor Palpatine Surgical Reconstruction Center on Coruscant, a hypersophisticated prototype Ubrikkian DD-13 surgical droid moved away from the project that it and an enhanced FX-6 medical droid had spent many days rebuilding.

The armour itself (according to the Star Wars novels "Light and Dark" and "Tales of the Jedi") is largely based on existing designs for Sith Droids and General Grievous' armour, details of which we can assume Sidious would have had ready access to.