I have used furring strips from the lumber yard and just cut to length. If you are using box springs you can use maybe a half-dozen for less than $10. More would be required for a platform bed that uses only a mattress.
You can get a full set with additional pieces to link them all together from Amazon for about $26 or walmart.com for $34.
Is there a question or were you asking for someone to do the job?
Here is a site with everything you wanted and needed to know about bed slats! http://homeguides.sfgate.com/size-wood-used-make-bed-slats-88525.html
https://www.doityourself.com/stry/how-to-make-bed-slats
I have used furring strips from the lumber yard and just cut to length. If you are using box springs you can use maybe a half-dozen for less than $10. More would be required for a platform bed that uses only a mattress.
You can get a full set with additional pieces to link them all together from Amazon for about $26 or walmart.com for $34.
Measure from side to side for your particular bed and then cut 1/4"-1/2" less than that measurement.
Go to Lowes or Home Depot and select 4" wide and about 1/2" thick boards, they will cut them to your length for free.
If you're looking to buy some, a quick search online will turn up a bunch of options or you could try Ikea if you have one near you.