Real frankincense is easy to get a hold of. It is sometimes referred to as Frankincense tears, it is a resin collected from trees. I’ve seen it for sale in health food stores, shops in Greek orthodox churches and a million places online.
I have never found a stick or cone incense, even those labeled frankincense that smells the same.
Resin incense is burned on charcoal discs, which can be purchased the same places the incense can.
It is also easy to find frankincense essential oil, it’s a bit pricey but has a lovely scent, not exactly the same as burning but pure and pungent. Also found at health food stores or online.
Most people do not like the scent of myrrh. It is not used as Church incense. you can find myrrh in the same forms as frankincense…resin, essential oil.
Often candles and air sprays that say “frankincense and myrrh” smell nothing like either of them, though they may be pleasantly scented.