Anyone have a source for bulk shift housing. I used to buy packs at REI but they don't sell it anymore.
I'm thinking Amazon but wanted some input.
Thanks.

Did you google at all? Plenty of online stores sell 15m or 50m of shimano SP41 or equivalent.

Yes, lots of hits, some places I've heard of; some places I never heard of. Just want some recommendations on where people have had good experiences--price, shipping time, etc...
Not all places are the same.

I've been buying 25' rolls of Jagwire shift and brake housing from Amazon.

Whatever bike store served you well on other bike purchases will be fine. I bought mine at Jenson, but only because other items I bought got me over the free shipping threshold. But any other vendor will be similar.
BTW, the optislick cable itself was cheapest on ebay.

If you have an FD, one of those sets with front and rear housing and cable may be economical. I don't have FD anymore, so that route wasn't for me.

I have bought 10 meter rolls of Jagwire housing from Universal Cycles:
https://www.universalcycles.com/shop...757&category=7
They are online, but since one of their brick & mortar stores is local to me I can order online and pick up in-store. They have treated me well.

I buy 82' rolls (25 meters) of generic shift housing from an ebay vendor for the charity shop. Here is a link if your are interested, they also have brake housing as well in 82' rolls. Both are black. about $32 for the shift housing and about $25 for the brake housing.

shift
https://www.ebay.com/itm/NEW-Black-8...r=510361758642

brake
https://www.ebay.com/itm/NEW-Black-o...r=520171674005

...I've bought the bulk Jagwire plastic lined stuff (about their medium grade) housing in bulk boxes from a couple of suppliers who list on Amazon, as well as some bulk boxes of stainless die drawn slick cables. They all seem pretty competitive in price, and it's hard to have a bad experience on Amazon buying something like this, because the bulk bike cables and housing are not something a lot of places care to carry and sell.

I did have one experience where I ordered the better grade stuff, and the supplier sent me the cheapest housing from Jagwire, but it was quickly remedied when I e-mailed them and explained the issue.

Niagara used to be good for stuff like this, but they're gone now. If you're not an actual bike shop, this is about the best you're gonna be able to do buying this stuff.

Wholesalers to Bike shops stock it... want Jagwire? the selling shop needs a QBP Account..

so online retail sellers , if you don't like your LBS..