ABC Gifts & Awards make what look like nice seating chips and I've heard good things about them. You could make your own, and same with seating cards.
I made multiple sets of seating chips (4 -- one not shown below) -- one set for up to 50 players, but most with up to 30. The sets shown only show 1 table worth of seating chips. I used cheap chips. I've shown 3 examples below. I also made my own seating cards. I used Microsoft Word to make labels for the chips and the cards, which I had laminated. I have less than $10 in each of the sets. The seating cards were a bit more expensive, but I suspect less than commercially made seating cards.
One possibility is to put one set of seating chips at the tables, and then have players draw seating chips and match the text on their drawn seating chip to one on a table. I did that for a while, but then went with seating cards because they were easier to read.
Another thing you can do is use seating chips as the bounty chips. That gets complicated if you allow re-entries or re-buys. You could eliminate that by having one side be the seating chip and have "Bounty" printed on the opposite side of the chips. Then you could use blue (for example) seating chips and red bounty chips. You could also use a blank chip as a bounty.
One potential issue with using bounty chips is that sometimes 2 (and in theory even 3 or 4 players) could split a bounty. Then what do you do? I do 2 bounty tournaments a year. One we don't use bounty chips -- we track it on paper. Players get paid based on recorded bounties, and if it's split, they split the bounty. The other we use their seating chip as a bounty chip. That tournament has rules that prevents split bounties.
This is a cheaper way to do it. It's also customizable for your situation. I have 2 set dealer positions at each table, and commercial non-custom seating chips wouldn't accommodate that.