Ten titles, ten pairs
On the day recorded, ten product or service pages sat in the ranked set for this query. Every one of them named two compounds. Not one offered the compound in the query as a single-compound product.
That is a fact about a recorded set on one date. It is not a claim that a single-compound product does not exist somewhere, and it is worded carefully for a reason: a further-down result on the same page, outside the set this site records, carried a single compound. Naming it here would mean naming a vendor this site did not verify for this query, so the count stays honest and the vendor stays unnamed. See the recorded set, read as labels.
The one place a single name showed up
One result in the set names a single compound, and it is not a product page. It is a community thread, where a person is asking the same one-name question the reader typed:
"Where is a great legit place to buy cjc1295?"
That is the shape of the whole search. A reader arrives naming one compound. The market answers with two. The only place the single name survives is in the question, and every listing that tries to sell against that question widens it into a pair. This site records the gap rather than closing it with a definition it cannot source.
The supplier this site links is also a pair
The supplier this site earns on does not break the pattern, and this page says so plainly. Its catalog names the product as a pair too, joined by the word with rather than by a symbol. Two names, stated instead of punctuated, but still two.
That supplier's own buying guide also states there is no retail channel and no pharmacy shelf for these materials, which is the background fact that makes the whole search look the way it does. You can read its catalog on its products page and check the shape of the name for yourself.
Where the question goes next
Once a title names two compounds, the question stops being where to buy and becomes what a document has to prove. A two-name product moves the burden onto the certificate, which now has to resolve two identities rather than one.
For what that document must actually confirm, read identity, resolved per component. For why a two-name product raises the stakes once the vial arrives with nothing printed on it, read a pair in unlabeled glass.